Biotechnology involves the application of biological processes and technologies such as genetic engineering --in order to produce novel or useful products like drugs, diagnostic tools, drought-resistant crops, or even a whole new class of super computers. Biotechnology is the industrial use of living organisms to manufacture food, drugs, and other products. The brewing and baking industries have long relied on the yeast micro-organism for fermentation purposes; dairy industry employs a range of bacteria and fungi to make milk products such as cheeses and yogurt. Enzymes, whether extracted from cells or produced artificially, are central to most biotechnological processes. Other advances include genetic engineering in which single-celled organisms with modified DNA, are used to produce insulin, and other drugs. Genomics which is large-scale DNA sequencing and bio-informatics that comprises blending of IT and biotechnology could revolutionise the drug-discovery process.